Following vrodrider's link for small business
http://smallbusiness.findlaw.com/business-taxes/do-you-have-to-pay-sales-tax-on-internet-purchases.html
Below is c/p from www.streamlinedsalestax.org
The Streamlined Sales Tax Governing Board
The effort that became the Streamlined Sales Tax Governing Board began in March 2000 (under Clinton). The goal of this effort is to find solutions for the complexity in state sales tax systems that resulted in the U.S. Supreme Court holding (Bellas Hess v. Illionis and Quill Corp. v. North Dakota) that a state may not require a seller that does not have a physical presence in the state to collect tax on sales into the state. The Court ruled that the existing system was too complicated to impose on a business that did not have a physical presence in the state. The Court said Congress has the authority to allow states to require remote sellers to collect tax. The result of this work is the Streamlined Sales and Use Tax Agreement. The purpose of the Agreement is to simplify and modernize sales and use tax administration in order to substantially reduce the burden of tax compliance. The Agreement focuses on improving sales and use tax administration systems for all sellers and for all types of commerce.
Today twenty-four states have adopted the simplification measures in the Agreement (representing over 31 percent of the population) and more states are moving to adopt the simplification measure.
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